Improved clamp for furnace-men s use



Uwifrnn STATES ALBERT P. BRIGGS, OF TAUNTON, MASSACHUSETTS.

IMPROVED CLAIVIP FOR FURNACE-MENSUSE.

To all whom t may concern:

Be it known that I, ALBERT P. BRIGGS, of

Taunton, in the county of Bristol and State. ot' Massachusetts, haveinvented a new and Im proved Adjustable Clam p for Furnace-Mens Use; andI do hereby declare that the following is a full and exact descriptionthereof, ret'- ereuce being had to the accompanying drawings, making apart of this specification, each part being designated by the sameletter in all the tigures.

Figure l represents the clamp ready for use 5 Fig. 2, the upper piece,A, Fig. 3, the lower piece, B, and Fig. 4 the vclamp partly extended.

The clamp is made of metal, and is cast in two parts, A and B, which areheld together by the clasps or straps G and D. At the outer end of A isthe jaw a, and at the outer end ot' B thejaw b. These are at such anangle with A and B that the distance between the ends of thejaws, asbetween o and o, shall be about one inch farther than the distancebetween no and x. On the under side of A is the rack or ratchet with itsteeth g g. 0n the upper side ot' B is the spur S. The clasp D is rivetedto the piece A, but is sufficiently loose or large to permit the piece Bto be moved freely within it. The clasp C is attached to the piece B,

and is made sufficiently large to allow the piece A to be raised up sothat the ratchet on the under side of A shall clear the spur S, andthusv permit the clamp to be extended. 0n the upper side of the clasp Cis riveted the spring E. This spring pressing on A and holding thatpiece againstB, thespur S locks into the teeth, as at s, and preventsthe two parts of the clamp from being separated.

Its application and operation are as follows:

The two or more parts of the furnace-dash which it is desired to clamptogether are placed in their proper position. The clamp is then extendedby lifting the part A clear from the spur S and bringing it out as faras desired, so that the distance between the jaws shall be greater thanthe thickness to be clamped. Then place the jaw b (at o) on the underside of the ask, press down the piece A until its jaw strikes the upperside of the iiask. The spur S, catehiuginto the ratchet on A, preventsthe parts from separating. Now push the clamp bodily on to the flask andall parts will be held firmly together.

I do not claim as my invention a common clamp with rigid or fixedjawsfas these have long been used; neither do lclaim an adjustableclamp, irrespective of the frnethod ot' itsgadjustability, as this hasbeen accomplished by using a screw in one of tllejaws; but

I do claim as my invention- An adjustable clamp made in twol parts,regulated by a ratchet and spur, made and operating substantially asherein set forth; and I desire to secure by Letters Patent an adjustableclamp, as above described.

ALBERT P. BRIGGS. l/Vitnesses:

L. T. TALBOT. S. P. BRIGGs.

